I was wondering if anyone has a DG house number to generic part cross reference somewhere (if not I suppose I'll start one). Pat of this is prompted by a part (not *yet* suspect) I ran across on a Nova 800 CPU1 board. From the prints it looks like it's a a quad 2-input mux like a 74158, but the pinouts are completely different and it's got wired-or outputs suggesting OC outputs. Select and enable are on 9 and 7 (I may have those switched); 1 = i0a, 2 = i0b, 3 = ya, 4 = yb, 5 = i1b, 6= i1a, 10 = i2a, 11 = i2b, 12 = yc, 13 = yd, 15 = i3a, 14 = i3b Of course, that's just the way it's drawn. It could be somewhat different :-) Does this part sound familiar to anyone? Best, Chris -- Chris Kennedy chris(a)mainecoon.com http://www.mainecoon.com PGP fingerprint: 4E99 10B6 7253 B048 6685 6CBC 55E1 20A3 108D AB97